This can only be a core function of the original game.I think this is not possible to do it with RBR ...

Pas de support par MP. JE NE TRAVAILLE PAS POUR RALLYESIM QUAND UN MP ARRIVE !!!Le forum est le meilleur endroit pour obtenir de l'aide. Plus de personnes peuvent vous aider et les réponses peuvent aider d'autres pilotes.No support by PM. I'M NOT WORKING FOR RALLYESIM WHEN I RECEIVE A PM !!!Forum is the best place to get help. More poeple can help you and answer can be useful for everybody !

This can only be a core function of the original game.I think this is not possible to do it with RBR ...

I think it can be done...! Because all effects are already there [rain, snow, day, night, ...] so maybe it's just about making a code that let's all effects starts randomly, That would amazing if it can be done.